Stock-based Awards (Details - Options) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Weighted-Average Remaining Contractual Life
Stock-based compensation expense	$ 3,498	$ 6,385
Options
Number of Options
Outstanding at the beginning of period (in shares)	6,078,180
Granted (in shares)	0
Exercised (in shares)	(60,985)
Canceled/forfeited (in shares)	(297,208)
Outstanding at the end of the period (in shares)	5,719,987		6,078,180
Weighted-Average Exercise Price
Outstanding at the beginning of period (in dollars per share)	$ 9.24
Granted (in dollars per share)	0
Exercised (in dollars per share)	2.68
Canceled/forfeited (in dollars per share)	7.30
Outstanding at the end of the period (in dollars per share)	$ 9.41		$ 9.24
Weighted-Average Remaining Contractual Life
Weighted average remaining contractual life (in years)	5 years 7 months 6 days		6 years 2 months 12 days
Remaining stock-based compensation expense for unvested awards	$ 3,300
Weighted average period over which remaining stock based compensation expense for unvested awards is expected to be recognized (in years)	2 years 7 months 6 days
Stock-based compensation expense	$ 400	$ 1,600